A Cambro-Ordovician Section in the Beaverfoot Range, near Golden, British Columbia

Burling, Lancaster D.

doi:10.1017/s0016756800109240

Cited by 3 publications

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References 1 publication

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“…The Glenogle Formation (Burling, 1922;Henderson, 1954;Leech, 1954Leech, , 1958 is present only at the extreme northern edge of the Wild Horse River map-area, where it forms a thin (<100 m thick) south-tapering wedge beneath the sub-Beaverfoot unconformity. It comprises dark brown to black, laminated mudstone and quartz wackestone overlain by black limestone locally containing 1-3 mm euhedral pyrite crystals.…”

Section: Glenogle Formationmentioning

confidence: 99%

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The southern termination of the Western Main Ranges of the Canadian Rockies, near Fort Steele, British Columbia: stratigraphy, structure, and tectonic implications

Larson

Price

2006

Bulletin of Canadian Petroleum Geology

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The Wild Horse River map-area is situated near the Crowsnest Pass cross-strike discontinuity, which marks the southern termination of the Western Main Ranges subprovince of the Southern Canadian Rocky Mountains. The Crowsnest Pass cross-strike discontinuity is a transverse northeast-trending tectonic feature marked by profound changes in structural style and in Paleozoic stratigraphy between the Laurentia craton and the Cordilleran miogeocline. Cambrian and Ordovician strata in the Wild Horse River map-area accumulated on the northwest side of the discontinuity in two contrasting tectonostratigraphic domains. One domain consists of an incomplete stratigraphic succession that was deposited on the Windermere high, a high-standing fault block within the Paleozoic miogeocline that was intermittently tilted eastward. The other domain contains a thicker more complete shaly succession that accumulated adjacent to the margin of the Laurentia craton. This latter succession contains local intercalations of diatreme-related volcanic rocks, the emplacement of which may have been controlled by basement faults that defined the margin of the miogeocline. The east verging Lussier River thrust fault separates the two domains. The dominant structures east of it are the Porcupine Creek anticlinorial fan structure and the east-verging Ruault Lake thrust fault. The Ruault Lake fault has been synformally backfolded in the west flank limb of the Porcupine Creek fan structure; both it and the fan structure are truncated by the out-of-sequence Lussier River fault. All convergence-related structures are cut and thermally overprinted by approximately 111 Ma granitic stocks that date all the thrusting and folding as pre-Albian. The transverse Boulder Creek fault, which branches from the Lussier River fault, may be a dextral tear fault that was reactivated as a down-to-the-north normal fault during Tertiary displacement along the Southern Rocky Mountain Trench fault. RÉSUMÉLa région cartographiée de Wild Horse River est située près de la discontinuité entre-croisée de Crowsnest Pass, laquelle indique la terminaison côté Sud de la sous-province des chaînes principales de l'Ouest, localisée sur le côté Sud des Montages Rocheuses canadiennes. La discontinuité directionnelle entre-croisée de Crowsnest Pass est une caractéristique tectonique transversale, orientée vers le Nord-est, marquée par des modifications importantes du style structural et de la stratigraphie Paléozoïque entre le craton de Laurentia et la cordillère miogéocline. Dans la région cartographiée de Wild Horse River, les strates du Cambrien et de l'Ordovicien se sont accumulées sur le côté Nord-ouest de la discontinuité en deux domaines tectonostratigraphiques contrastants. L'un des domaines consiste en une succession stratigraphique incomplète qui s'est déposée sur le haut de Windermere, un bloc faillé de haut niveau à l'intérieur de la miogéocline Paléozoïque, basculée vers l'Est par intermittence. L'autre domaine contient une succession argileuse complète plus épaisse qui s'es...

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Section: Glenogle Formationmentioning

confidence: 99%

“…The Beaverfoot Formation (McConnell, 1887;Burling, 1922;Evans, 1933;Leech, 1958;Norford, 1962), which is widespread in the Southern Canadian Rocky Mountains, records an extensive transgressive carbonate shelf that developed above a regional unconformity.…”

Section: Beaverfoot Formationmentioning

confidence: 99%

The southern termination of the Western Main Ranges of the Canadian Rockies, near Fort Steele, British Columbia: stratigraphy, structure, and tectonic implications

Larson

Price

2006

Bulletin of Canadian Petroleum Geology

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Ordovician and Silurian

Cecile

Norford

1993

Sedimentary Cover of the Craton in Canada

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Most Ordovician and Silurian rocks in western and northwestern Canada were deposited on the North American craton and its western continental margin. Strata of these ages have also been recognized in three allochthonous terranes in the Cordillera, described in the companion volume on the Cordilleran Orogen (Gabrielse and Yorath, 1991). The continental margin is equated with the Cordilleran Miogeocline of western Canada. The miogeocline/craton boundary is along a hinge line west of which the rate of thickening of Paleozoic strata increases significantly. On the basis of initial 87Sr/86Sr ratios for Mesozoic and younger plutonic rocks (Armstrong, 1979) that intrude them, all autochthonous Ordovician and Silurian strata, of both platformal and basinal facies, are inferred to be underlain by attenuated continental crust, and are thus in the miogeocline. Oceanic rocks are virtually unknown, and if present are either buried beneath younger strata, masked by metamorphism, and/or transported northwestward by Mesozoic and Cenozoic strike-slip faults. The only strata of this age that may be oceanic are rocks of the Kootenay Terrane in southernmost British Columbia. The Cordilleran Miogeocline formed in Late Proterozoic to Early Cambrian time (see Bond and Kominz, 1984). It is considered to be a continental margin of Atlantic type that was affected by several periods of renewed extensional tectonism, one of which occurred during late Early Ordovician and Middle Ordovician time. The eastern part of this ancient continental margin and adjacent craton were characterized by shallow-water, carbonate platforms and/or land areas composed mostly of exposed older Paleozoic and Precambrian

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Devonian Stratigraphy, Sunwapta Pass Area, Alberta, Canada

Severson¹

1950

Bulletin

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A Cambro-Ordovician Section in the Beaverfoot Range, near Golden, British Columbia

Cited by 3 publications

References 1 publication

The southern termination of the Western Main Ranges of the Canadian Rockies, near Fort Steele, British Columbia: stratigraphy, structure, and tectonic implications

The southern termination of the Western Main Ranges of the Canadian Rockies, near Fort Steele, British Columbia: stratigraphy, structure, and tectonic implications

Ordovician and Silurian

Devonian Stratigraphy, Sunwapta Pass Area, Alberta, Canada

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